Gravity Load Table (Psf)

T-Rib

ARCHITECTURAL ROOFING Effective September 2007

GRAVITY LOAD TABLE (PSF)

substrate / width / 3.0' / 3.5' / 4.0' / 4.5' / 5.0'
24 ga. steel / 12" / 75 / 65 / 57 / 50 / 45
24 ga. steel / 18" / 57 / 48 / 42 / 38 / 34
22 ga. steel / 12" / 94 / 81 / 71 / 63 / 56
22 ga. steel / 18" / 71 / 60 / 53 / 48 / 43
.032" alum. / 12" / 55 / 52 / 49 / 46 / 42
.032" alum. / 18" / 42 / 39 / 37 / 34 / 32

Notes:

1. Allowable loads are based on 1980 edition of AISI specifications.

2. Deflection is limited to L/240 of span.

3. Loads are based on spans of 3 or more.

4. FY = 50 ksi for steel panels.

5. Uplift values based on attachment to 16 ga. purlins with 2 #10-16 SD ST screws.

DESIGN INFORMATION

The T-Rib panels can be custom tapered to a minimum width of 2¼" and a maximum width of 18". The maximum length of tapered panels is 40'.

The maximum purlin spacing for the T-Rib panels is 4'.

Minimum roof slope is ½:12.

Panel can be curved in the field to a minimum radius of 200'.

Maximum panel length is 65'.

Minimum panel length is 6'.

TEST REPORT SUMMARIES

AIR INFILTRATION: had 0.015 cfm/sq ft leakage with 6.24 psf pressure differential per ASTM E283.

WATER RESISTANCE: No water penetration under 5 gal./hr. spray at 6.24 psf pressure differential per ASTM E 331.

UL90 UPLIFT RATING: 18" wide, 24 ga. panels on 16 ga. purlins (50 ksi yield strength) spaced 4' o.c. with two screws per clip and up to 6" of insulation between the panels and purlins (Construction No. 103).

UL90 UPLIFT RATING: like Construction No. 103 (above) but with optional foamed plastic insulation (1¼" to 1½" thickness) between panels and purlins and with butts occurring over purlins (Construction No. 139).

UL90 UPLIFT RATING: 18" wide, 24 ga. panels on ½" plywood with clips spaced 2' o.c. and two #12-14 screws per clip (Construction No. 415).

UL90 UPLIFT RATING: 18" wide, 24 ga. panels on 22 ga. deck (33 ksi yield strength) with clips spaced 2' o.c. Clips are fastened to deck with two #14 truss-head, No. 3 Phillips drive, self-drilling screws per clip. Bearing plates (4½" x 6" x 24 ga.) are required under each clip. One to 4" of rigid insulation (2 pcf density) is optional between the panel and deck (Construction No. 416).

T-Rib

ARCHITECTURAL ROOFING

MATERIAL, THICKNESS, & WIDTH / WT./SQ. PLAIN / WT./SQ. PAINTED / METAL SPECIFICATION / FINISH
ALUMINUM
0.032" (12")
0.040" (12")
0.032" (16")
0.040" (16")
0.032" (18")
0.040" (18") / 76.8 lb.
95.2 lb.
68.9 lb.
85.5 lb.
66.2 lb.
82.1 lb. / 78.3 lb.
97.1 lb.
70.3 lb.
87.2 lb.
67.6 lb.
83.8 lb. / 3105H14 or equal (20 ksi yield strength) aluminum alloy conforming to ASTM B 209. / plain: mill finish.
painted: two-coat 70% Kynar® 500/ Hylar® 5000; 0.5 mil two-coat polyester backer.
GALVANIZED STEEL
24 ga. (12")
22 ga. (12")
24 ga. (16")
22 ga. (16")
24 ga. (18")
22 ga. (18") / 173.1 lb.
216.4 lb.
155.3 lb.
194.2 lb.
149.4 lb.
186.8 lb. / 174.9 lb.
215.6 lb.
156.9 lb.
196.1 lb.
150.9 lb.
188.7 lb. / Grade 50 (50 ksi yield strength) structural steel with G90 coating, conforming to ASTM A 653. / plain: regular spangle.
painted: two-coat 70% Kynar® 500/ Hylar® 5000; 0.5 mil two-coat polyester backer.
ALUMINUM-ZINC ALLOY COATED STEEL
24 ga. (12")
22 ga. (12")
24 ga. (16")
22 ga. (16")
24 ga. (18")
22 ga. (18") / 168.1 lb.
210.1 lb.
150.8 lb.
188.5 lb.
145.0 lb.
181.4 lb. / 169.8 lb.
212.2 lb.
152.3 lb.
190.4 lb.
146.5 lb.
183.2 lb. / Grade 50 (50 ksi yield strength) structural steel with AZ50 coating, conforming to ASTM A 792. / plain: regular spangle.
painted: two-coat 70% Kynar® 500/ Hylar® 5000; 0.5 mil two-coat polyester backer.

Weights above include caps.

Jackson, GA (800) 884-4484

Grapevine, TX (800) 477-9066

Salem, OR (800) 477-8028

Headquarters - Lancaster, PA (800) 477-2741

T-Rib

SPECIFICATIONS

PART IGENERAL

1.01SUMMARY

Section includes: Prefinished, prefabricated, mechanically seamed, structural standing seam roof system and accessories.
Related Sections
Metal decking
Rough carpentry, plywood, and underlayment
Insulation
Membrane roofing
Flashing and sheet metal
Joint sealers: sealants and caulk
Structural framing.

1.02REFERENCES

A.American Society for Testing and Materials (ASTM)

1.ASTM A 653: Steel Sheet, Zinc-Coated by the Hot Dip Process

2.ASTM A 792: Steel Sheet, Aluminum-Zinc Alloy Coated by the Hot Dip Process.

3.ASTM B 209: Aluminum and Aluminum Alloy Sheet and Plate.

4.ASTM E 283: Air leakage

5.ASTM E 331: Water penetration

B.Underwriters Laboratory

1.UL Building Materials Directory

C.Sheet Metal and Air Condition Contractors National Association, Inc. (SMACNA)

1.SMACNA Architectural Sheet Metal Manual, 1993 Edition.

D.American Iron and Steel Institute (AISI)

1.AISI Cold Formed Steel Design Manual

E.Metal Construction Association (MCA)

1.Preformed Metal Wall Guidelines

F.Code references

1.ASCE, Minimum Loads for Buildings and Other Structures

2.BOCANationalBuilding Code

3.UBCUniformBuilding Code

4.SBCStandardBuilding Code

1.03SYSTEM DESCRIPTION

A.Performance Requirements: Provide factory formed, prefinished, mechanically seamed, concealed clip, structural standing seam metal roof system, that has been pretested and certified by manufacturer to comply with specified requirements under installed conditions.

1.Provide UL90 rated roofing system that has been tested in accordance with UL 580 test procedure.

2.Resistance to air leakage: 0.015 cfm/ft. of joint leakage when tested in accordance with ASTM E 283 at static pressure differential of 6.24 psf.

3.Resistance to water penetration: No leakage through panel joints when tested in accordance with ASTM E 331 at static pressure differential of 6.24 psf.

B.Structural Requirements: Engineer panels for structural properties in accordance with latest edition of American Iron and Steel Institute’s Cold Formed Steel Design Manual using “effective width" concept and Aluminum Association’s Aluminum Design Manual.

C.Maximum clip spacing shall be 4' o.c.

1.04SUBMITTALS

A.Product Data: submit manufacturer's specifications, standard profile sheet, product data brochure and finish warranty.

B.Shop Drawings: shop drawings showing roof plan with layout of panels, clips, clip attachment, underlayment and sections of each flashing/trim condition shall be submitted for approval prior to fabrication. Drawings shall contain material type, metal thickness and finish. Drawings shall distinguish between factory and field fabrication.

C.Samples:

1.Submit sample 12" long x full width panel, showing proposed metal gauge, seam profile and specified finish.

2.Submit manufacturers standard colors for Architect's selection.

D.Test Reports:

1.Submit the test reports prepared by Underwriters Laboratory indicating wind uplift rating of proposed roof system. Themanufacturer must be listed by name in the UL Directory.

2.Air leakage per ASTM E 283 and Water penetration per ASTM E 331. (Actual independent laboratory certified test results must be submitted).

E.Certification: Submit manufacturer's certification that materials and finishes meet specification requirements.

1.05QUALITY ASSURANCE

A. Panel manufacturer shall have a minimum of ten (10) years of experience in manufacturing architectural roofing in a permanent stationary indoor facility.

B. Panel installer shall have a minimum of two (2) years experience in the installation of concealed clip architectural standing seam metal roofing and show evidence of successful completion of at least three (3) projects of similar size, scope, and complexity.

1.06DELIVERY, STORAGE, and HANDLING

A. Panels shall be protected and properly packaged to protect against transportation damage in transit to the jobsite.

B. Upon delivery, exercise care in unloading, stacking, moving, storing, and erecting panels to prevent twisting, bending, scratching, or denting.

C. Store panels in a safe, dry environment under a waterproof covering to prevent water damage. Allow for adequate ventilation to prevent condensation. Panels and flashings with strippable film shall not be stored in direct sunlight.

D. Upon installation immediately remove strippable film from panels and flashings. Protect panels and flashings from foot traffic and from all other trades.

1.07PROJECT CONDITIONS

A. Field dimensions shall be taken prior to fabrication to verify jobsite conditions.

1.08WARRANTIES

A. Panel manufacturer shall provide a twenty (20) year warranty on the paint finish covering chalking, cracking, checking, chipping, blistering, peeling, flaking, and fading.

B.Applicator shall furnish written warranty for a two (2) year period from date of substantial completion of building covering repairs required to maintain roof and flashings in watertight conditions.

PART IIPRODUCTS

2.01PRODUCT DESCRIPTION

A. T-Rib structural standing seam roof system as manufactured by Fabral, 3449 Hempland Road, Lancaster, PA 17601, ph.: 800-477-2741; fax: 800-283-4289.

A. Panels: The T-Rib panel shall have a width of 12", 16", or 18" wide. Seams shall be 2½" high with a ½" top flange angled at 90 degrees from the seam to facilitate the seaming of the panel and cap. The panels shall have 1/16" x 1" stiffening ribs in the pan of the panel.

C. Roof panels shall use a one-piece roof clip allowing for thermal movement of the panel system.

D. The panel shall have a factory applied mastic and be mechanically seamed with a field operated electric seaming machine provided by the manufacturer.

E. The panel system shall be as a true standing seam shape requiring no trapezoidal foam closures, plugs, or fillers at eaves.

F. The maximum cap length shall be 30'.

2.02PRODUCT SUBSTITUTIONS

A. Requests to use alternate systems shall be submitted in writing to the project designer at least ten (10) days prior to bid date. Request shall demonstrate proposed substitution meets or exceeds specified performance requirements. Certified statements, samples and descriptive data shall be included in this submittle request.

B.Manufacturers listed in this section are prequalified manufacturers. Substitution of manufacturer's products for those specified shall not be allowed at anytime during construction.

T-Rib

SPECIFICATIONS

2.03MATERIALS AND FINISHES

A.Panel materials

24 or 22 gauge, Grade 50 (50 ksi yield strength) structural steel with G90 (0.90 oz./ft.2) hot dipped galvanized coating, both conforming to ASTM A 653.
24 or 22 gauge, Grade 50 (50 ksi yield strength) structural steel with AZ50 (0.50 oz./ft.2) aluminum-zinc alloy coating, both conforming to ASTM A 792.
0.032" or 0.040", 3105-H14 or equal (20 ksi yield strength) aluminum alloy conforming to ASTM B 209.

B.Texture: panels shall be smooth

C.Finish: paint shall be full strength 70% polyvinylidene fluoride (Kynar/Hylar* fluorocarbon) baked-on coating, factory applied prior to roll forming. The treatment shall be a two-coat system consisting of a single coat of 0.2 mil. primer followed by a finish coat of 0.8 mil. Kynar topcoat with a total dry film thickness of 1.0 mil ± 0.2 mil. The reverse side of the panels shall be treated with a back coat system consisting of a 0.2 mil. primer with a 0.3 mil. topcoat for a total dry film thickness 0.5 mil.

2.04ACCESSORIES

A.Concealed clips:

AC3 roof clip: a one piece, 18 ga. galvanized steel or (stainless steel), ¼" stand-off, used on purlins (with or without up to 4" vinyl faced batt insulation) or light gauge framing and metal decking (with or without rigid insulation board and a bearing plate).
AC4 roof clip: a one piece, 18 ga. galvanized steel ( or stainless steel), ¼" stand-off used on bar joist (with or without up to 4" vinyl faced batt insulation).
AC5 roof clip: a one piece, 18 ga. galvanized steel (or stainless steel), 1 ¼" stand-off used on purlins (with 4" to 8" batt insulation).
Deck style roof clip: a one piece, 22 ga. galvanized steel used on plywood underlayment.

B.Flashing and Trim

All flashing and trim shall be of the same material, gauge, finish, and color as the roof panels and fabricated in accordance with standard SMACNA procedure and details.
Provide transition rib covers where roofing changes pitch.
Fabricate gutters and downspouts in the same gauge, material, finish, and color as the roof panels.

C.Fasteners

Clips to substrate: screw shall be #12-14, self tapping type, zinc-plated steel.
Flashings to panels: exposed screws shall be zinc plated with a #14 x " combination steel and neoprene washer, color to match panel.
Pop rivets: #43 stainless steel, color finish to match panel.

D.Sealants

Shall not contain oil, asbestos, or asphalt.
Factory applied weatherstripping shall be applied in the seam cap and designed for metal to metal concealed joints.
Field applied panel end sealant shall be mastic tape sealant.
Exposed sealant shall be one-part polyurethane joint sealant. Coordinate color with roof panels.

E.Closures

Ridge and hip closures shall be protected and supported by a formed metal closure manufactured from the same material, color, and finish as the panels.
Metal closures shall be factory fabricated and field-cut as needed.

F.Thermal blocks

Thermal blocks shall be:

a.Non-treated wood as per manufacturer’s recommendation.

b.Extruded polystyrene block.

c.EPDM membrane.

G.Vapor Retarder:

1.Retarder with a permeance of 0.05 or less as determined by ASTM E 98.

2.05RELATED MATERIALS

A.Refer to other sections listed in Related Sections paragraph for related materials.

2.06FABRICATION

A. Roof panels shall be formed in continuous lengths.

B. Panels shall be roll formed on a stationary industrial type rolling mill to gradually shape the sheet metal. Portable rollformers, rented or owned by the installer, are not acceptable.

C.Fabricate flashings from the same material as the roof system.

2.07SOURCE QUALITY

A. Source Quality: obtain metal panels and accessories from a single manufacturer.

B. Fabrication tolerances: follow tolerances in MCA’s Preformed Metal Wall Guidelines.

C. Tests and inspections

D.Verification of performance

PART IIIEXECUTION

3.01MANUFACTURER’S INSTRUCTIONS

A. Compliance: Comply with manufacturer’s product data, including product technical bulletins, product catalog installation instructions, and product cartons for installation.

3.02EXAMINATION

A.Installer shall:

1.Inspect roof deck and/or purlins to verify that it complies with shop drawings and is smooth, even, sound, and free of depressions.

2.Report variations and potential problems in writing to the architect.

3.03INSTALLATION

A. Conform to the standard set forth in the SMACNA architectural sheet metal manuals and the approved shop drawings detailed for the project.

B. Install panels plumb, level, and straight with the seams parallel, conforming to the design as indicated.

C. Install panel system so it is watertight, without waves, warps, buckles or distortions, and allow for thermal movement considerations.

D.Abrasive devices shall not be used to cut on or near roof panel system.

E. Apply sealant tape or caulking as necessary at flashing and panel joints to prevent water penetration.

F.Remove any strippable film immediately upon installation.

G. Hand-crimp battens at each clip or mechanically seam before workers stand on panels.

H. Seam panels together with electric-powered seaming machine supplied by the panel manufacturer for a weathertight seam.

I.Vapor retarder: The joints, perimeter, and all openings shall be sealed per the manufacturer's instructions to provide a continuous vapor retarder.

J.Underlayment (solid substrate):

1.Provide one layer of 30# felt with horizontal overlaps and endlaps staggered between layers.

2.Provide ice and water shield membrane at all valley and eave conditions as well as any area at less than a 3:12 slope.

3.Lay parallel to ridge line with 2½" horizontal laps and 6" vertical laps

3.04CLEANING

A.Dispose of excess materials and debris from jobsite.

B. Remove filings, grease, stains, marks, or excess sealants from roof panel system to prevent staining.

C.Protect work from damage from other trades until final acceptance.

*Kynar® 500 is a registered trademark of Atofina Chemicals.

Hylar® 5000 is a registered trademark of Ausimont USA, Inc.